Don't throw exception in list of entities.

If no IDs were requested, we should not throw an exception in case an
entity is un-accessible by the user.
Add admin UI.
Admin UI follow up.
Add request and account to multiple entity views.
Refresh tokens and expirable access tokens.
Make the expiration time configurable for token auth.
Issue #265: Admin UI for the access token module.
Merge pull request #268 from nader77/multiple_entity_view

Add request and account to multiple entity views.
Issue #259: empty <> !isset :horse:
Merge pull request #270 from mateu-aguilo-bosch/259-api-version-missing-0

Issue #259: Fix incorrect version number.
Issue #52: Add missing documentation for errors.
Merge branch '7.x-1.x' into php-apache-server

Conflicts:
	includes/RestfulManager.php